Matt, my guess would be a driveline harmonic (vibration) would lead to the
torn seal. Do the 4.7s use an aluminum driveshaft?
can you post the graphs? I'd like to see what you curves look like.. If I
read that right, you picked up 10rw ft/lbs... quite a substatial gain
_______________________
Jon Smith--Raleigh, NC
jon@fast4x4.net
www.fast4x4.net
'95 Dakota 4x4 318 CC auto
> Ok, here's the scoop. I pulled 3 times, up to 6000 rpms, and 120 MPH,
> (bawahhaa haa haa) That was in 4th gear, hee hee hee, Uhmm, I'd be scared
to
> see what 5th gear would do!!
> The PCM gave me 8 RWHP, and 9 RWTQ.
> So my new total is 216 RWHP, and 292 RWTQ (WOW).
> Now, I'm averaging the 3 runs I did. The average of the 3 I did at
Carlisle
> was 208 RWHP, and the average of yesterday was 216 RWHP.
> The average TQ at Carlisle was 282.5, and yesterday was 291.5
>
> New numbers: 216 hp @ 4800 rpm
> 291.5 TQ @ 3200 rpm
>
> MODS were: homemade air intake, K&N filter, Synthetic oil/lube,
Flowmaster
> muffler and tailpipe, custom PCM.
>
> I'm estimating a crankshaft HP of 255 hp, and TQ approx. 345 ft lbs (at
3200
> rpms!!!!!!) did somebody say the 4.7L had no low end TQ???? :) hee hee
>
> What do I think about the custom PCM?? Ok, for 8 hp, its a little over
> rated, and over priced, I was expecting around 12 to 15 RWHP. It did
flatten
> out my power curve even more. Considering this engine was only rated at
230
> hp and 295 ft lbs @ the crankshaft from the factory, And I am now almost
> pulling that TQ figure at the rear wheels , and within 15 RWHP of that
> advertised 230 hp, I'm very happy with that. Especially since I haven't
> touched anything inside the engine, no lower intake or head work, no TB,
no
> cams or rockers, nothing internal. I believe with a Cam change, and air
> intake change (Z-tube), maybe a TB?? Headers and full custom exhaust this
> engine is capable of 1 hp per cubic inch @ the flywheel, or in my case
> (5spd) 243 RWHP.
>
>
> BTW, while on the dyno I cut a rear Trans. yoke seal, don't know how or
why,
> maybe some crazy stuff happened at 6000 rpms??? Anyway, 30 bucks and 3
hrs
> later I'm back on the road. I hope this isn't a reoccurring problem.
>
>
> __________________________________
> Matt--VA--Y2K-HEMI `00 Sport Plus RC
> 4.7L 5spd. 9 1/4 3.92 LSD, Homemade air intake,
> T-Bars, Spring clamps, Mobil 1,Hoosiers
> 3" Flowmaster cat-back,Custom PCM
> 14.48 @ 92.40 MPH
> 216 RWHP/291.5 RWTQ
> ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
>
>
>
>
>
>
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